Mix Proportioning of Biochar as a Partial Replacement of Cement Using Alkaline Activators in Concrete Composite

Year : 2025 | Volume : 13 | Special Issue 02 | Page : 628 639
    By

    B. Vamsi Krishna,

  • P. Venu Gopal,

  • Ashok Kumar Suluguru,

  1. Associate Professor, Department of Civil Engineering, Malla Reddy Vishwavidyapeeth Secunderabad, Telangana, India
  2. PG Scholar, Department of Structural Engineering, Department of Civil Engineering, Malla Reddy Engineering College, Secunderabad, Telangana, India
  3. Associate Professor, Department of Civil Engineering, Malla Reddy Engineering College, Secunderabad, Telangana, India

Abstract

The growth of the world population has led to a heightened need for housing, making construction a crucial sector. Cement, a critical element in concrete mixtures, is indispensable in construction activities. Yet, the diminishing reserves of natural resources such as limestone and rocks, essential for cement manufacturing, necessitate sustainable options. This research investigates the creation of sustainable concrete blends by incorporating biochar and ground granulated blast furnace slag (GGBS), activated with alkaline solutions (NaOH and Na₂SiO₃) at various concentrations (2, 4, 6, and 8). Demolition waste aggregates replaced coarse aggregate in varying mix proportions aimed at achieving maximum compressive strength. Findings revealed that using 100% GGBS with 100% coarse aggregate at 8 molarity resulted in a compressive strength of 66.20 MPa at 28 days. When incorporating 10% biochar into a mix of 100% GGBS at 8 molarity, the compressive strength reached 64.90 MPa at 28 days. It was noted that reducing GGBS from 100% to 25% and increasing biochar from 0% to 75%, alongside construction waste aggregates from 10% to 50%, led to a decline in compressive strength. Furthermore, higher molarity corresponded to increased compressive strength.

Keywords: Sustainable concrete composites, biochar, ground granulated blast furnace slag (GGBS), construction wastes, sodium hydroxide, sodium silicate, alkaline activators.

[This article belongs to Special Issue under section in Journal of Polymer and Composites (jopc)]

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How to cite this article:
B. Vamsi Krishna, P. Venu Gopal, Ashok Kumar Suluguru. Mix Proportioning of Biochar as a Partial Replacement of Cement Using Alkaline Activators in Concrete Composite. Journal of Polymer and Composites. 2025; 13(02):628-639.
How to cite this URL:
B. Vamsi Krishna, P. Venu Gopal, Ashok Kumar Suluguru. Mix Proportioning of Biochar as a Partial Replacement of Cement Using Alkaline Activators in Concrete Composite. Journal of Polymer and Composites. 2025; 13(02):628-639. Available from: https://journals.stmjournals.com/jopc/article=2025/view=205117


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Special Issue Subscription Review Article
Volume 13
Special Issue 02
Received 13/05/2024
Accepted 10/09/2024
Published 20/02/2025
Publication Time 283 Days
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